Table construction



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Nov. 25, 1930. L. R. MGulRE TABLE CONSTRUCTION Filed Sept. 4, 1928l Lee RJWSG j Patented Nov. 25, 1930 y A, 'UNITED-STATES;PATENT-OFFICE LEE jROY MGGUIRE," OE NEWAEKMNEW" .iEnsEr, nssrGNoEJro WEsTEEN ELEo'rmo l, i OOMPANY, INcoRroRATEn-OF NEW YORK, N. Y., A coEroEArroN OE NEWYYORK TABLE CONSTRUCTION t Application mea september 4, 192s. serial Nt. "soayva` S Y This invention relates vto table constructions, and more particularly tofwork tablesor benches for factoryuse. a

provide"aitabletop` kconstruction which is economicalto build `and maintain and at the same time possessing wear resisting properf ties. 'W t l`- `In accordancewith' the general features of this invention `as applied to a work table or bench `forfaotory use there is 'provided an upright metal frame having a metal top foundation plate provided with upwardly projecting Outer flanges to forrn a receptacle for a magnesite composition which` is applied directly-upon a surface of expanded metal weldedat intervals directly tothe top foundation plate,'th`e expanded metal providing an effective anchorage for the composition. In the preferredform of the inventionthe mag-` nesite composition is appliedintwo coats, the bottom coat which 'is Vof the greater thick` ness is more flexible than the upper coat which is somewhat harder andis colored as desired. An oil dressing is applied to the `surface of theupper coat to prevent the constituents of the composition from collecting in the form ofadust.` i

Other objects andadvantages of this invention will .more fully appear from the following detailed description taken in connection with the accompanying drawing, in which Figlis a fragmentary elevationlof a work tablexembodyingthe features of thisf-invention'. f l

Fig. 2fisl an "enlarged fragmentary plan view thereof, partly in section, and

Fig. 3 is anenlarged vertical sectiononthe line133 of Figr2.' H j Y t Y Referring now to the drawing indetail in whichlike reference numerals designate similar parts throughout the several views, and particularly toiFig. 1, there is illustrated an elevation Vof a workta-ble or bench for factory use comprising a top 10 supported at either end and at suitable intermediate points thereof, depending ion the length of the tablel or -bench,"upo`n a plurality of welded steel legs 11 `braced by angular steelbrackets 12. The brackets 121 are eachY preferably Welded at The principal object ofthe invention is to' either end to the associated legl `11 andthe i under surface of asteel foundation plate 13 of the top 10.` As clearly illustratedin Figs.

2' and 3 the foundation plate 13 is provided with an upwardly projecting flange 141 eX- tending therearound at itsouter edgesf The flange 111 is .made .from a plurality of angle plateswelded at all jointsand at suitable intervalsl'to theplate 13. Along the back and two ends .of the table the flange 14 extendsup- Wardly forslightly ay greater `height than alongthe front, thefoundationplate13 being bevelled at the two forward corners as clearly kshown in Fig. 2. AIn"addition all sharp edges throughout the table structure, particularly alongthe front thereof, are rounded in order to'reduce the likelihood of injurytofan operator passing orV sitting' attlie table. i

An expanded metalplate 17, the purpose of whichwill `be 'made apparent shortly, -is spot welded at suitable intervals to the top surfaceof 'the .foundationplate 13 and eX- tends across the entire surface thereof in close i Y flange 14 to `provide a .back to .the` table,

the height ofthe plate may varywith-diiferent tables orin some instances may be omitted.

It will beV apparent that the foundation plate 13 with the upwardly projectingflange .14` extending therearound at its outer edges forms a receptacle, the uppersurface of the plate 13 being covered withthe `expanded metal plate 17, whichmay be-ofthe well known type, thus providing an irregular surface comprising` a plurality ofangularly disposed surfaces. lThe receptacle thus provided isfilled with a composition possessing wear resisting properties upto the level of the upper edge ofthe front anglerplate of the-flange 14, as clearly indicated at the right side ofFig; 3, which in theparticular structure illustrated provides a composition A composition of the oxide chloride type, such as magnesite, has been found suitable for this purpose and is preferably applied in a plastic state in two coats, the bottom coat of which is of greater thickness, for instance, ve-eigliths of an inch, and is rendered more flexible by a variation of the constituents than the upper coat which is three-eighths of an inch in thickness and is somewhat harder due to another variation in the constituents comprising the composition. A suitable coloring matter may be added to the composition comprising the upper coat to give the desired color effect-and then trowled to provide a smooth outer working surface as described.

The constituents comprising the composition forming the bottom coat may be in the following` proportions Parts Magnesite Wood flour 13 Asbestos 13 Talc 20 Silex 20 TheV constituents comprising the composition forming the upper coat may be in the following proportions:

Parts Magnesite 8O Wood flour 5 Asbestos 13 Talc 13 Silex 13 Green oxide 13 The plastic magnesite composition becomes rigidly hardened within a few hours after being deposited in the receptacle provided in the framework of the table top 10 and thereafter the outer surface is given a dressing to prevent the constituents of the composition from collecting in the form of a dust. In practice a dressing which has been found satisfactory consists firstof raw linseed oil with 10% to 15% of turpentine and thereafter a second coat of dressing consisting solely of raw linseed oil. Due to the attaching of the expanded metal plate 17 to the upper surface of the plate 13, the plastic composition lodges between the angular surfaces thereof and, upon hardening, the two coats of composition are firmly anchored as a whole in the receptacle of the table top 10.

In practice bench tops of the hereinbefore described type have proven very satisfactory from a life standpoint as well as the standpoint of economy in cost of first construction and ease of repair. They are capable of standing a considerable amount of hard usage and if they should crack or otherwise become damaged the damaged portion can be readily removed and substitute` material added. Furthermore, to re-surface a magnesite bench top there is only involved the removal of the composition and refilling the steel receptacle with new composition in plastic form without in any way changing, for instance, electrical conduits or other bench connections or machines which may be fixed to the bench top, the entire re-surfacing operation being performed without dismantling the work bench.

What is claimed is: l

1. In a table construction, a receptacle, means having a plurality of an ularly disposed surfaces attached to and a utting the inner horizontal surface thereof, and a composition surrounding the angularly disposed surfaces of said means and substantially filling the receptacle.

2. In a work table, a foundation plate having upwardly projecting elements providing a receptacle, a perforated metallic member attached to the upper surface of the plate, and a composition lodged within the perforations of the member and substantially filling the receptacle for providing a working surface. f

'3. In a work table, an upright frame, a horizontally disposed metallic plate mounted thereon having an upwardly projecting flange extending therearound providing a receptacle, an expanded metallic member attached to the upper surface of the plate, and a composition lodged within the openings of the member and substantially lling the receptacle for providing a working surface.

4. In a work table, an upright frame, a horizontally disposed metallic plate mounted thereon having an upwardly projecting flange extending therearound providing a receptacle, an expanded metallic member attached to and covering the upper surface of the plate, and a composition lodged within the openings of the member and substantially lling the receptacle applied in two layers varying in their constituents, the outer layer of which is of less thickness and comparatively harder than the inner layer.

5. In a work table, an upright frame, a horizontally disposed metallic plate attached thereto having an upwardly projecting flange extending therearound providing a receptacle, means attached to the upper surface of the plate having a plurality of angularly disposed surfaces, anda composition surrounding the angularly disposed surfaces and substantially filling the receptacle applied in a plurality of layers varying in their constituents, the outer layer of which is comparatively harder than the inner layer.

6. In a table construction, a receptacle, means having a plurality of angularly disposed spaced surfaces attached to and abutting a horizontal upper surface of the receptacle, and a composition surrounding the angularly disposed surfaces of said means and substantially filling the receptacle.V

` stantially filling the receptacle. j

' 8. In `a table construction, a receptacle,`

7. In a table construction, a receptacle,` e

means having a plurality of angularly disposed surfaces integral With the inner surface of the'receptaole at a plurality of points, and a composition surrounding the angularly disposed surfaces of said means and submeans having-a plurality of angularly disposed surfaces Welded to the inner surface of the receptacle at aplurality of spaced points extending longitudinally and transversely of the receptacle, and a composition surrounding the angularly disposed surfaces of said Ineans and substantially filling the Ie-V Y f ceptacle. Y

In Witness whereof, I hereunto subscribe A i my name this 23rd day of August A. D.,1928. v

LEE ROYV MCGUIRE. 

